High frequency super conductive filter

A high frequency filter, comprising:

• a substrate having a first face and a second face, said first face being a sapphire R-plane;
• a conductive layer disposed on said second face of said substrate and connected a fixed electrical potential level;
• an input terminal and an output terminal formed on said first face of said substrate;
• resonating portions formed between said input terminal and said output terminal, said resonating portion each having a long side and an asymmetric shape, wherein one of said long side is arranged to make an angle of ψ with <11-20> direction of said first face and 0°≦ψ≦30°.

A method comprising:

• forming a substrate having a first face and a second face, wherein said first face a sapphire R-plane;
• forming a conductive layer on said second face, wherein said conductive layer is configured to be connected to a fixed electrical potential level;
• forming a pair of input terminals and an output terminal on said first face;
• and forming resonating portions between said input terminal and said output terminal, herein said resonating portions each have a hairpin-shape, said hairpin shape having at least one long side and at least one short side, said at least one long side is arranged to make an angle of ψ with <11-20> direction of said first face, wherein 0°≦ψ≦30°.